<!-- transitions -->
<h1 transition:blur>Hello</h1>
<h1 transition:fade>Hello</h1>
<h1 transition:fly>Hello</h1>
<h1 transition:slide>Hello</h1>
<h1 transition:scale>Hello</h1>
<h1 transition:draw>Hello</h1>
<!-- also for in/out transitions -->
<h1 in:blur>Hello</h1>
<h1 out:blur>Hello</h1>
<!-- animate -->
<h1 animate:flip>Hello</h1>
<!-- not others -->
<h1 transition:foo>Hello</h1>
<h1 in:foo>Hello</h1>
<h1 out:foo>Hello</h1>
<h1 animate:foo>Hello</h1>